// Jan 29 2006 by Dustin McCormick < djmccormick@gmail.com >
// Tested with gcc version 3.3.4 on GNU/Linux 2.4.29 i686
//
// gcc: 	http://gcc.gnu.org/
// GNU: 	http://www.gnu.org/
// Linux: 	http://www.kernel.org/

#include <iostream>
using namespace std;

class Counter{
    public:
	Counter(int size);
	Counter();

	void reset();
	void incr1(short int x=1);
	void incr10(short int x=1);
	void incr100(short int x=1);
	void incr1000(short int x=1);
	void showMenu();
	void getOperation();
	bool doOperation(char x, int y);
	bool overflow();
    private:
	int countLimit;
	int countCurrent;
};

int main(){
	int size;

	cout << "Welcome to the counter program.\n" << endl;
	cout << "Please enter the maximum value that this counter will hold: ";
	cin >> size; cout << endl;

	Counter myCounter(size);
	myCounter.showMenu();

	return 0;
}

Counter::Counter(int size) : countLimit(size), countCurrent(0){
}

Counter::Counter() : countLimit(9999), countCurrent(0){
}

void Counter::reset(){
	countCurrent = 0;
}

void Counter::incr1(short int x){
	if(x > 9 || x < 0){
		cout << "ERROR: Illegal argument @ Counter::incr1(x)" << endl;
		exit(1);
	} else{
		countCurrent += (x*1);
	}
}

void Counter::incr10(short int x){
	if(x > 9 || x < 0){
		cout << "ERROR: Illegal argument @ Counter::incr1(x)" << endl;
		exit(1);
	} else{
		countCurrent += (x*10);
	}
}

void Counter::incr100(short int x){
	if(x > 9 || x < 0){
		cout << "ERROR: Illegal argument @ Counter::incr1(x)" << endl;
		exit(1);
	} else{
		countCurrent += (x*100);
	}
}

void Counter::incr1000(short int x){
	if(x > 9 || x < 0){
		cout << "ERROR: Illegal argument @ Counter::incr1(x)" << endl;
		exit(1);
	} else{
		countCurrent += (x*1000);
	}
}

void Counter::showMenu(){
	cout << "CENTS:\t\t\ta{1-9}" << endl;
	cout << "DIMES:\t\t\ts{1-9}" << endl;
	cout << "DOLLARS:\t\td{1-9}" << endl;
	cout << "TENS OF DOLLARS:\tf{1-9}" << endl;
	cout << "QUIT:\t\t\tx" << endl;
	cout << "Example: a9, means 9 cents." << endl;
}

void Counter::getOperation(){
	char x;
	short int y;

	cout << "\nOperation: ";
	cin >> x;
	cout << "\nNumber: ";
	cin >> y;

	Counter::doOperation(x, y);
}

bool Counter::doOperation(char x, int y){
	bool continue = true;

	switch(x){
	    case 'a':
		incr1(y);
		break;
	    case 's':
		incr10(y);
		break;
	    case 'd':
		incr100(y);
		break;
	    case 'f':
		incr1000(y);
		break;
	    case 'x':
		continue = false;
		break;
	    default:
		cout << "ERROR: Illegal input @ Counter::showMenu" << endl;
		cout << "continuing..." << endl;
		break;
	}

	return continue;
}

bool Counter::overflow(){
	if(countCurrent > countLimit){
		return true;
	} else{
		return false; 
	}
}